φ76mm二次穿孔机组定心辊设备改进  

Improved on Centering Roller of φ76mm Second-Piercing Mill

作　　者：苏忠富[1] 

机构地区：[1]天津市无缝钢管厂,天津300220

出　　处：《冶金设备》2005年第5期47-50,共4页Metallurgical Equipment

摘　　要：阐述了利用φ76二次穿孔机组生产小口径热轧无缝钢管,对一次穿孔机组定心辊进行设备改进.用液压定心辊代替气动定心辊,加大了定心辊的抱紧力,提高了顶杆的稳定性;增加一套定心辊,使一次穿孔机组的走钢线加长.改造后,定心辊可以满足用φ76二次穿孔机组生产φ80～φ140×4.5～8×8000mm的热轧无缝钢管要求.The producing small caliber hot rolled seamless steel tube by using second - piercing mill arid the improvement of first piercing mill centering roller are introduced. The substitution pneumatic centering roller with hydraulic centering roller, increases the clasp force of the centering roller, and improves the stability of the mandril. Adding a suit of centering roller will make the steel rope route of first piercing mill become longer. After the revamping, the centering roller can satisfy the production of （φ80 - φ114） × （4.5 -8 ） × 8000mm hot rolled seamless steel tube by using the second piercing mill.

关 键 词：定心辊 抱紧力 顶杆 轧制中心线 

分 类 号：TG333.2[金属学及工艺—金属压力加工]